27SiMn厚壁钢管结构用不锈钢厚壁无缝钢管尺寸公差
标准：
GB/T 14975-2002------中国国家标准
用途：
适用于一般结构及机械结构
尺寸公差：
|
热轧（挤、扩）钢管 |
冷拔（轧）钢管 |
|
尺寸 |
允许偏差 |
尺寸 |
允许偏差 |
|
普通级 |
高级 |
普通级 |
高级 |
|
公称外径D |
68-159 |
±1.25%D |
±1.0%D |
公称外径D |
10-30 |
±0.30 |
±0.02 |
|
>30-50 |
±0.40 |
±0.30 |
|
>159-426 |
±1.5%D |
>50 |
±0.9%D |
±0.8%D |
|
公称壁厚
S |
<15 |
+15%S
-12.5%S |
±12.5%S |
公称壁厚
S |
≤3 |
±14%S |
+12.5%S
-10%S |
|
≥15 |
+20%S
-15%S |
>3 |
+12.5%S
-10%S |
±10%S |
化学成份
|
牌号 |
化学成分（质量分数）(%) |
|
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
Ti |
其它 |
|
0Cr18Ni9 |
≤0.07 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
8.00-11.00 |
17.00-19.00 |
|
|
|
|
1Cr18Ni9 |
≤0.15 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
8.00-10.00 |
17.00-19.00 |
|
|
|
|
00Cr19Ni10 |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
8.00-12.00 |
18.00-20.00 |
|
|
|
|
0Cr18Ni10Ti |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
9.00-12.00 |
17.00-19.00 |
|
≥5C% |
|
|
0Cr18Ni11Nb |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
9.00-13.00 |
17.00-19.00 |
|
|
Nb≥10C% |
|
0Cr17Ni12Mo2 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
10.00-14.00 |
16.00-18.50 |
2.00-3.00 |
|
|
|
00Cr17Ni14Mo2 |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
12.00-15.00 |
16.00-18.00 |
2.00-3.00 |
|
|
|
0Cr18Ni12Mo2Ti |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
11.00-14.00 |
16.00-19.00 |
1.80-2.50 |
5C%-0.70 |
|
|
1Cr18Ni12Mo2Ti |
≤0.12 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
11.00-14.00 |
16.00-19.00 |
1.80-2.50 |
5(C%-0.02)-0.80 |
|
|
0Cr18Ni12Mo3Ti |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
11.00-14.00 |
16.00-19.00 |
2.50-3.50 |
5C%-0.70 |
|
|
1Cr18Ni12Mo3Ti |
≤0.12 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
11.00-14.00 |
16.00-19.00 |
2.50-3.50 |
5(C%-0.02)-0.80 |
|
|
1Cr18Ni9Ti |
≤0.12 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
8.00-11.00 |
17.00-19.00 |
|
5(C%-0.02)-0.80 |
|
|
0Cr19Ni13Mo3 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
11.00-15.00 |
18.00-20.00 |
3.00-4.00 |
|
|
|
00Cr19Ni13Mo3 |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
11.00-15.00 |
18.00-20.00 |
3.00-4.00 |
|
|
|
00Cr18Ni10N |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
8.50-11.50 |
17.00-19.00 |
|
|
N:0.12-0.22 |
|
0Cr19Ni9N |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
7.00-10.50 |
18.00-20.00 |
|
|
N:0.10-0.25 |
|
00Cr17Ni13Mo2N |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
10.50-14.50 |
16.00-18.50 |
2.00-3.00 |
|
0.12-0.22 |
|
0Cr17Ni12Mo2N |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.030 |
10.00-14.00 |
16.00-18.00 |
2.00-3.00 |
|
0.10-0.22 |
|
1Cr17 |
≤0.12 |
≤0.75 |
≤1.00 |
≤0.035 |
≤0.030 |
* |
16.00-18.00 |
|
|
|
|
0Cr13 |
≤0.08 |
≤1.00 |
≤1.00 |
≤0.035 |
≤0.030 |
* |
11.50-13.50 |
|
|
|
|
1Cr13 |
≤0.15 |
≤1.00 |
≤1.00 |
≤0.035 |
≤0.030 |
* |
11.50-13.50 |
|
|
|
|
2Cr13 |
0.16-0.25 |
≤1.00 |
≤1.00 |
≤0.035 |
≤0.030 |
* |
12.00-14.00 |
|
|
|
|
00Cr18Ni5Mo3Si2 |
≤0.030 |
1.30-2.00 |
1.00-2.00 |
≤0.035 |
≤0.030 |
4.50-5.50 |
18.00-19.00 |
2.50-3.00 |
|
|
注：1. 1Cr18Ni9Ti不推荐使用。 2.*残余元素Ni≤0.60.
|
